158 citations · 998 across the 31 of their papers we have counts for
33 papers
Femtoscale imaging of the proton with Ioffe-time distributions
Robert G. Edwards, Joe Karpie, Christopher Monahan +5
Mapping how strongly interacting constituents are distributed within protons is a key goal of nuclear physics and a major direction of the future Electron Ion Collider program. We…
Reconstructing the full kinematic dependence of GPDs from pseudo-distributions
Hervé Dutrieux, Robert G. Edwards, Joe Karpie +7
We propose a reconstruction of the full dependence of unpolarized isovector proton generalized parton distributions (GPDs) and from lattice QCD data…
Accessing the Gluon Momentum Fraction of Nucleons through the Gradient Flow
Robert Edwards, Joe Karpie, Lorenzo Maio +5
We calculate the gluon momentum fraction of the nucleon using lattice quantum chromodynamics (QCD), with a nonperturbative renormalization technique based on the gradient flow. The…
Gaussian Processes for Inferring Parton Distributions
Yamil Cahuana Medrano, Hervé Dutrieux, Joseph Karpie +2
The extraction of parton distribution functions (PDFs) from experimental or lattice QCD data is an ill-posed inverse problem, where regularization strongly impacts both systematic…
Comment on "LaMET's Asymptotic Extrapolation vs. Inverse Problem"
Hervé Dutrieux, Joe Karpie, Christopher J. Monahan +4
In arXiv:2504.17706 {Dutrieux:2025jed} we criticized the excessive model-dependence introduced by rigid few-parameter fits to extrapolate lattice data in the large momentum effecti…
Window observables for benchmarking parton distribution functions
Joe Karpie, Christopher J. Monahan, Kostas Orginos +1
Global analysis of collider and fixed-target experimental data and calculations from lattice quantum chromodynamics (QCD) are used to gain complementary information on the structur…
Inverse problem in the LaMET framework
Hervé Dutrieux, Joe Karpie, Christopher J. Monahan +4
One proposal to compute parton distributions from first principles is the large momentum effective theory (LaMET), which requires the Fourier transform of matrix elements computed…
A simple non-parametric reconstruction of parton distributions from limited Fourier information
Hervé Dutrieux, Joseph Karpie, Kostas Orginos +1
Some calculations of parton distributions from first principles only give access to a limited range of Fourier modes of the function to reconstruct. We present a physically motivat…
Non-local Nucleon Matrix Elements in the Rest Frame
Joe Karpie, Christopher Monahan, Anatoly Radyushkin
Extracting parton structure from lattice quantum chromodynamics (QCD) calculations requires studying the coordinate scale dependence of the matrix elements of bilocal operato…
Towards Unpolarized GPDs from Pseudo-Distributions
Hervé Dutrieux, Robert G. Edwards, Colin Egerer +7
We present an exploration of the unpolarized isovector proton generalized parton distributions (GPDs) and in the pseudo-distribution formalism…
Extracting the Pion Distribution Amplitude from Lattice QCD through Pseudo-Distributions
Daniel Kovner, Joe Karpie, Konstantinos Orginos +2
The Light-Cone Distribution Amplitude (LCDA) encodes the non-perturbative information of the leading Fock component of the hadron wave function, therefore required for processes in…
Evolution of Parton Distribution Functions in the Short-Distance Factorization Scheme
H. Dutrieux, J. Karpie, C. Monahan +2
Lattice QCD offers the possibility of computing parton distributions from first principles, although not in the usual factorization scheme. We study in this paper t…
Gluon helicity from global analysis of experimental data and lattice QCD Ioffe time distributions
J. Karpie, R. M. Whitehill, W. Melnitchouk +6
We perform a new global analysis of spin-dependent parton distribution functions with the inclusion of Ioffe time pseudo-distributions computed in lattice QCD (LQCD), which are dir…
Long-distance contribution to from lattice QCD
Ziyuan Bai, Norman H. Christ, Joseph M. Karpie +3
A lattice QCD approach to the calculation of the long-distance contributions to is presented. This parameter describes indirect CP violation in decay. While the shor…
Non-singlet quark helicity PDFs of the nucleon from pseudo-distributions
Robert G. Edwards, Colin Egerer, Joseph Karpie +9
The non-singlet helicity quark parton distribution functions (PDFs) of the nucleon are determined from lattice QCD, by jointly leveraging pseudo-distributions and the distillation…
Towards the determination of the gluon helicity distribution in the nucleon from lattice quantum chromodynamics
Colin Egerer, Bálint Joó, Joseph Karpie +10
We present the first exploratory lattice quantum chromodynamics (QCD) calculation of the polarized gluon Ioffe-time pseudo-distribution in the nucleon. The Ioffe-time pseudo-distri…
Complementarity of experimental and lattice QCD data on pion parton distributions
P. C. Barry, C. Egerer, J. Karpie +8
We extract pion parton distribution functions (PDFs) in a Monte Carlo global QCD analysis of experimental data together with reduced Ioffe time pseudo-distributions and matrix elem…
Discovering new physics in rare kaon decays
Thomas Blum, Peter Boyle, Mattia Bruno +20
The decays and mixing of mesons are remarkably sensitive to the weak interactions of quarks and leptons at high energies. They provide important tests of the standard model at…
Coulomb corrections to pi-pi scattering
Norman Christ, Xu Feng, Joseph Karpie +1
The relationship between finite volume multi-hadron energy levels and matrix elements and two particle scattering phase shifts and decays is well known, but the inclusion of long r…
scattering, QED and finite-volume quantization
Norman Christ, Xu Feng, Joseph Karpie +1
Using the Coulomb gauge formulation of QED we present a lattice QCD procedure to calculate the scattering phase shift including the effects of the Coulomb potential which…
The transversity parton distribution function of the nucleon using the pseudo-distribution approach
Colin Egerer, Christos Kallidonis, Joseph Karpie +8
We present a determination of the non-singlet transversity parton distribution function (PDF) of the nucleon, normalized with respect to the tensor charge at GeV from l…
Unpolarized gluon distribution in the nucleon from lattice quantum chromodynamics
Tanjib Khan, Raza Sabbir Sufian, Joseph Karpie +9
In this study, we present a determination of the unpolarized gluon Ioffe-time distribution in the nucleon from a first principles lattice quantum chromodynamics calculation. We car…
The Continuum and Leading Twist Limits of Parton Distribution Functions in Lattice QCD
Joseph Karpie, Kostas Orginos, Anatoly Radyushkin +1
In this study, we present continuum limit results for the unpolarized parton distribution function of the nucleon computed in lattice QCD. This study is the first continuum limit u…
Neural-network analysis of Parton Distribution Functions from Ioffe-time pseudodistributions
Luigi Del Debbio, Tommaso Giani, Joseph Karpie +3
We extract two nonsinglet nucleon Parton Distribution Functions from lattice QCD data for reduced Ioffe-time pseudodistributions. We perform such analysis within the NNPDF framewor…